Properties of matter
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Properties of Matter. How do we tell different types of matter apart?. Salt or Sugar?. What is a property?. A distinctive attribute or quality of something An observation. Two Types of Properties. There are two types of properties: Physical Properties Chemical Properties.

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Properties of Matter

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Properties of Matter


How do we tell different types of matter apart?


Salt or Sugar?


What is a property?

  • A distinctive attribute or quality of something

  • An observation


Two Types of Properties

  • There are two types of properties:

    • Physical Properties

    • Chemical Properties


Physical Properties

  • Physical properties are properties that you can observe without changing the identity of the material.

  • For example: A rubber band is stretchy. If you stretch a rubber band, it is still a rubber band.


Physical Properties

  • Physical properties are descriptive.

  • They include the appearance and behavior.

    • The appearance of the item is how it looks, feels, tastes, as well as any measurable characteristics like mass, volume, etc.

    • The behavior of an item is going to be how it reacts with certain other things. For instance, metals are usually attracted by magnets.


Physical Properties

  • What are some physical properties of this honey?

Yellow-ish

Sticky

sweet


Common Physical Properties

  • Magnetic

  • Dense

  • Color

  • Size

  • Shape


Physical Change

  • A change in the size, shape, or phase of matter is known as a physical change.

  • A physical change is one in which the basic identity of the objectdoes not change!

  • Another way to look at it is that a physical change is one which you can change back.


Common Physical Changes

  • Physical changes change the appearance of a substance, but the chemical makeup does not change.

  • Examples of Physical Changes include:

    • Size

    • Shape

    • Phase (solid, liquid, gas)

    • Dissolving


Chemical Properties

  • A characteristic that indicates it can undergo an chemical change.


Common Chemical Properties

  • Flammability

  • Reactivity

  • Rust (Oxidation)


Chemical Properties

  • What is a chemical property of this railroad spike?


Chemical Change

  • The changing of one substance into another.

  • New substances are produced because of the breaking of chemical bonds.

  • ONE WHICH YOU CAN’T CHANGE BACK


Detecting Chemical Change

  • A new substance is ALWAYS produced in a chemical change.


New substances are produced by the making and/or breaking of bonds.

Chemical Changes


Indicators

  • There are five indicators that help us to know that a chemical change is taking place:

    • Unexpected Color Change

    • Energy Transfer

    • Precipitate Produced

    • Odor Produced

    • Gas Produced


1. Unexpected Color Change


2. Energy Transfer

  • Endothermic (gets cold)

  • Exothermic (gets hot)

  • Sound produced

  • Light produced


3. Precipitate Produced

  • Two liquids produce a solid

  • The solution sometimes looks cloudy or milky.

  • Solid falls to the bottom of the solution.


4. Odor Produced


5. Gas Produced


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